Integer Underflow Affecting iscsi-initiator-utils-devel package, versions <0:6.2.1.4-10.git2a8f9d8.amzn2023.0.4


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.19% (9th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-AMZN2023-ISCSIINITIATORUTILSDEVEL-19476376
  • published1 Sept 2026
  • disclosed13 Aug 2026

Introduced: 13 Aug 2026

NewCVE-2026-18728  (opens in a new tab)
CWE-191  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 iscsi-initiator-utils-devel to version 0:6.2.1.4-10.git2a8f9d8.amzn2023.0.4 or higher.
This issue was patched in ALAS2023-2026-2120.

NVD Description

Note: Versions mentioned in the description apply only to the upstream iscsi-initiator-utils-devel package and not the iscsi-initiator-utils-devel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

A flaw was found in open-iscsi. An integer underflow vulnerability in the iscsiuio component, specifically during IPv4 Dynamic Host Configuration Protocol (DHCP) parsing, allows a remote attacker on the same local network segment to cause a denial of service. By sending a specially crafted IPv4/UDP DHCP reply, the attacker can trigger an out-of-bounds read, leading to the iscsiuio process crashing. This issue affects systems where iscsiuio is actively handling IPv4 DHCP traffic.

CVSS Base Scores

version 3.1